New Moon -- the Moon is not illuminated by direct sunlight.

Waxing Crescent -- the visible Moon is partly but less than one-half illuminated by direct sunlight while the illuminated part is increasing.

First Quarter -- one-half of the Moon appears illuminated by direct sunlight while the illuminated part is increasing.

Waxing Gibbous -- the Moon is more than one-half but not fully illuminated by direct sunlight while the illuminated part is increasing.

Full Moon -- the visible Moon is fully illuminated by direct sunlight.

Waning Gibbous -- the Moon is less than fully but more than one-half illuminated by direct sunlight while the illuminated part is decreasing.

Last Quarter -- one-half of the Moon appears illuminated by direct sunlight while the illuminated part is decreasing.

Waning Crescent -- the Moon is partly but less than one-half illuminated by direct sunlight while the illuminated part is decreasing.